Figure 12
Replica of lime-based painting techniques using different black pigments: the picture shows the different colour of the black pigments both raw and manufactured after application with lime depending by the chemical composition and the particle size. The ground of the plaster (upper part) was smoothed with limewash whilst the surface of the lower part was left irregular. Pigments identification as follows, from left to right: Bol1d (5YR 5/6), Bol1f (5YR 7/2), Bol1c (10R 7/4), TN01a (10R 7/4), TR-D (5YR 2/1), TN-K (5YR 2/1), TO-K (5YR 3/4), TN-VF (5YR 5/2), Boc1 (5YR 5/2), Boc2 (5YR 2/2).